Microbial Life in Earth's Crust

The video explores the vast and largely unknown world of subsurface microbes, which are abundant in Earth's crust. These microbes, though slow and dormant, play a crucial role in Earth's ecosystems. The video discusses their potential impact on climate change, carbon storage, and the evolution of life. It highlights research conducted in Costa Rica's volcanoes, revealing how these microbes convert carbon dioxide into minerals, potentially offering solutions to surface-level carbon issues. The study of these microbes could lead to significant breakthroughs in understanding life on Earth and beyond.

What is the estimated weight of the gut microbiomes of all people and animals on Earth?

• 10,000 tons

• 1 million tons

• 100,000 tons

• 2 billion tons

How deep have microbes been found within the Earth's crust?

• 1 kilometer

• 3 kilometers

• 5 kilometers

• 10 kilometers

What analogy is used to explain the dormancy of deep subsurface microbes?

• A tree in winter

• A sleeping bear

• A hibernating frog

• A dormant volcano

What is a chemolithoautotroph?

• A microbe that uses sunlight to make food

• A microbe that uses chemicals from rocks to make food

• A microbe that feeds on other microbes

• A microbe that lives in water

What waste product do chemolithoautotrophs often produce?

• Minerals like rust or pyrite

• Carbon dioxide

• Methane

• Oxygen

What natural feature in Costa Rica was studied to understand subsurface microbial activity?

• Rainforests

• Volcanoes

• Beaches

• Mountains

What was the hypothesis about carbon dioxide in Costa Rican hot springs?

• It was being released into the atmosphere

• It was being filtered out by something underground

• It was dissolving in water

• It was causing volcanic eruptions

What role do chemolithoautotrophs play in carbon dioxide management?

• They consume carbon dioxide for energy

• They convert carbon dioxide into carbonate minerals

• They have no effect on carbon dioxide

• They release carbon dioxide into the atmosphere

What potential application of subsurface microbial research is mentioned?

• Developing new antibiotics

• Mitigating climate change

• Predicting weather patterns

• Improving crop yields

What is the new field of study that combines geology and biology?

• Geo-bio-chemistry

• Environmental science

• Astrobiology

• Marine biology